Valve



March 1l 1924; 1,486,25

G. KNIGHT VALVE Filed Dec. 3l. 1921 Patented Mar. ll, i924.V

UNE ST'E GEORGE KNIGHT, OF G-COLORYADQ VALVE. I

.Application filed December 31, 1921. Serial No. 526,136.

To @ZZ whom t may concern.'

Be it known that I, GEORGE KNIGHT, a citizen of the United States,residing at Sterling, in the county of Logan and State of Colorado, haveinvented certain new and useful improvements in Valves, of which thefollowing is a specication.

This invention relates to improvements in valves for regulating iiow ofsteams or liquids under pressure.

The primary object of the invention is the provision of an improvedvalve seating arrangement specifically adapted for use in connectionwith globe valves.

A further object of the invention is the provision of a valve member anda seat therefor, which are so cooperatively designed as to provide anovel, accurate, and positive sealing connection when the valve memberis disposed upon the seat.

A further object of the invention is the provision of a valvearrangement of the above described character', in which a valve memberso cooperates with the structure of its seat as to -provide a relativelygreat seating surface area, with which the valve member is in intimatecontact when the valve is closed; the valve member being so formed as toprovide a novel reinforcement for the valve seat to prevent lateraldistortion of the same incident to contraction oreXpansion of the valve,during the various uses to which the same may be subjected.

Other objects and advantages will be apparent during the course of thefollowing detailed description. y

In the accompanying drawing, forming` a part of this specification, andwherein sim- Cil ilar reference characters designate corresponding partsthroughout the severalviews.

Figure 1 is a vertical cross sectional view taken through a globe valvestructure and showing the improved valve seating arrangement therein.

igure 2 is a fragment-ary cross sectional view of the improved valveseating arrangement and showing the same in different adjusted positionfrom that shown in Figure 1.

Figure 3 is a vertical cross sectional view taken on the line 3 3 ofFigure 2,'and showing the valve seat structure.

lFigure il is a bottom plan view of the valve disc member and itsimproved formation.

lin the drawing, wherein for the purpose of illustration is shown thepreferred embodiment .of this invention; the numeral designates thevalve body portion having the openings 11 and 12 therein for entranceand exit respectively of gases or liquids. The valve body y10 may, ofcourse,`be of any design, and preferably has a web shaped partition -13therein providing the horizontal valve seat l111, in which the opening15 is provided for passage of substances from the inlet opening 11 -ontheir way to the exit opening 12. The seat 14: may be of any materialand is preferably formed of some hard metal, such as a nickel 'or alloy,from which valve seats are ordinarily constructed. The upper surface 16of the valve seat 14 is provided with a groove 17 which is formed inannular manner concentric with the passageway 15. The groove 17 is ofconstruction which is of prime importance, and includes the bottomsurface 18, which is relatively fiat; the inside and outer sides 19 and2O of said groove 17 diverg'ing upwardly from said bottom 18. Thus thegroove 17 is substantially V-shaped in formation, the inclination andheight of the sides 19 and 2() being substantially the same.

In case the valve seating arrangement is constructed in a globe valve,the disc valve member is providedon the lower end of the adjusting valvestem 26 being retained thereon as by a detachable nut `27. The cap 28 isdetachably maintained over the adjusting opening 29 in the body 10 as bythe nut 30; said stem 26 having certain screw threads 31 thereon forengaging in a threaded portion of the cap 28, and whereby the stem 26may be advanced or retracted with respect to the Seat 14C. An ordinarypacking nut 35, including a following gland 36, may be mounted upon theupper end of the cap 28 and about the stem 26, for providing a leakproof connection. An ordinary hand wheel 87 may be mounted upon theupper exterior end of the stem 26 for manual rotation thereof.

rlhe disc valve member 25 is of novel construction and includes a frustoconical depending portion 39 formed axially thereon, which 1s adaptedfor suspending over or in the passagewayv 15 when said valve member 25is mounted upon the stem 26. The lower surface of the valve member 25,is furthermore, provided with an annular eX- tension 41 preferablyformed concentric with the axes of the stem 26 and projec- The vvalvemember 25 is provided with an upwardly extending attaching flange 47which bears a certain relation to the depending'extension 41, in thatthe same is directly over this extension 41 for substantially one halfof the width of the V- shaped extension 41, and thus providing properreinforcement. The interior of the f ,attaching `48, and whereby the nut27 may be atlange 47 is screw threaded, as at i tached therein formounting the valve member l in proper manner upon the enlarged 1 head50, ordinarily found upon the lower end of a globe valve stem 26.

ln` operation, it is obvious that when the valve member 25 is Vraisedoff of the seat 14, the liquid or gas. will be permitted to flow throughthe body 1() as in ordinary globe valve manner. However, as the valvemember 25 Ais fed by the adjusting stem 26 toward the seat 14, thedepending annular extension 41 will enter the pocket formed by theannular groove 17, as is illustrated in Figure The gas or liquid will bebaffled to a considerable extent during its flow through the pocketgroove 17 when the extension 41 is in the position illustrated in Figure2. 1When the valve member 25 is seated upon the horizontal seat 14 toclose the valve structure, the bottom and side surfaces of the extensiontongue 41 will engage in intimate contact with the bottom and sidesurfaces of the groove 17. This manner of valve seating is novel, sinceheretofore it has been the practice to provide the l valve members withonly one seating surface'with respect to the valve seat. llt is a matterof common knowledge, that globe valve seats are subjected to suchpressures as to occasionally distort the seat so that the valve memberwill not fit tightly thereon. However, it is obvious that in the case ofthe tongue and groove joint provided in the improved structure hereinshown, the pressure forces will be directly transmitted into the valvemember structure 25, and will not leave thefull force of the pressure tobe borne by the web partition 13 and the seat 14.

Due to the various uses of globe valves, and to the Avariations intemperature in which the same are to be used, the valve seat interiorand exterior surfaces respectively of the groove 17, when the valvemember 25 is seated upon the seat 14. Thus, it can be seen that when thetendency of the seat 14 is toward contraction, the' same will belaterally reinforced, by yreason of the fact that the side 2O lengagesthe outer side 45 of the annular extension 41. On the other hand,lateral expansion of the seat 14 is insured against by reason oftheintimate contact of the inner surface 19 of the groove 17 with the innersurface -44 of the annular extension 41. y

The member 25 and the seat 14 may both be made ofthe same material, inorder that contraction and expansion will be relatively compensated forin both of these elements.

From the foregoing, it can be seen that the improved valve seatingarrangement is .of great utility in that the tongue and groove sealingjoint not only laterally reinforces the seat to preserve the life of theglobe valve, but provides such broad surface contact as to positivelyinsure against a leaking connection.

Various changes in the shape, size and arrangement of parts may be madeto the form of the invention herein shown and described, withoutdeparting from the spirit of the invention or the scope of the claim.

I claim: Y

A valve, comprising a body, a web partition mounted in said bodyincluding a horizontal seat provided with a passageway opening thereinand having an annular groove concentric about said opening and upon theupper surface of said horizontal seat, said groove having a flat bottomsurface and provided with upwardly extending diverging sides, a discvalve member of substantially the same material as said seat andincluding a depending annular extension providing a bottom surface andhaving upwardly diverging sides, and adjustable means mounting saidvalve disc member in said body for cooperation with said horizontalseat, and whereby the annular extension of said valve member may havethe bottom surface and sides thereof in intimate contact with .thebottom surface and sides of the groove in said seat, when said valve isclosed.

GEORGE KNTGHT.

